<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        ul {
            list-style: none;
            padding: 0;
            margin: 0 auto;
            width: 400px;
            height: 400px;
            background-color: skyblue;
            border-radius: 50%;
            position: relative;
            z-index: -999;
        }

        .smallCircle {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background-color: pink;
            position: absolute;
            top: 150px;
            left: 150px;
        }

        .jiantou {
            width: 0;
            height: 0;
            border-left: 25px solid transparent;
            border-right: 25px solid transparent;
            border-bottom: 60px solid red;
            position: absolute;
            top: -32px;
            left: 26px;
            z-index: -99;
        }
        .box{
            width: 0;
            height: 0;
            border-left: 90px solid transparent;
            border-right: 90px solid transparent;
            border-top: 180px solid yellow;
            position: absolute;
            z-index: -250;
        }
        .one{
          
            top: 6%;
            left: 28%;
        }
        .two{
           
            top: 16%;
            left: 46%;
            transform: rotate(52deg);
        }
        .three{
           
           top: 16%;
           left: 46%;
           transform: rotate(52deg);
       }
       .four{
           
           top: 16%;
           left: 46%;
           transform: rotate(52deg);
       } 
       .five{
           
           top: 16%;
           left: 46%;
           transform: rotate(52deg);
       }
        .six{
           
           top: 16%;
                 left: 46%;
           transform: rotate(52deg);
       }
    </style>
</head>

<body>
    <ul>
        <li class="one box">1</li>
        <li class="two box">2</li>
        <li class="three box">3</li>
        <li class="smallCircle"><span class="jiantou"></span></li>
        <li class="box five">5</li>
        <li class="box six">6</li>
        <li class="box seven">6</li>
    </ul>
</body>

</html>